Abstract: Sanggou Bay is one of the most important cultural areas in China. The scallop Chlamys farreri is a dominant cultural species in this Bay. To examine the effect of the cultural scallops on the suspension particle organic carbon （POC） of the Bay, field surveys on the living environmental conditions of the scallop in the bay were conducted in spring in 1999 and 2000. The main parameterclearance rate that can respond to the physiological condition of scallop was measured in laboratory. The clearance rate was determined using the method of food degression in static system. Meanwhile, the relationship of clearance rate and temperature that changed from 1 ℃to 30 ℃ was measured in the experiment. Results showed that the relation of clearance rate and temperature was same as Gaussian curve, and the relationship can be expressed as the following ： CR = 234.7 ? 7.17 ? （ 6.283）^0.5 ? EXP - 0.5 ? （ T ? 22.14） ? 7.174）^2. The average concentrations of POC in May and April were 432 μg? Cl^-1 and 139.92μg? Cl^- l, respectively. The range of primary production in May and April of the bay were 79.3- 220.8 mg?cm^-2?d^-1 and 57.2- 196.6 mg?cm^-2?d^-1 respectively. In respect of the temperature of sea water, there was no significant difference among the stations in April, but difference was observed among the stations in May（ P 〈 0.05）. The grazing impacts of the cultural scallops on POC stocking in May and April were between 10.2% - 73.4% and 6.2% - 25.2%, respectively; the mean grazing impacts were 40.8% and 18.8%, respectively. 10.9 % -49.9% and 39.8 % - 186.2 % stocking of the carbon coming from primary production were circulated into the main food web through scallop filtration in April and May respectively. There are significant differences between the stations and temperature is the mainly reason causing the difference.